LintPDFLintPDF

Everything Your PDFs Need, Checked Automatically

500+ rule-based checks + 91 PDF/X-4 conformance checks (ISO 15930-7) powered by a deterministic engine, plus 32 AI-powered inspections for content quality, regulatory compliance, and brand verification.

Three ways to run

LintPDF processes jobs in one of three modes. Pick per-request — mix and match across your workflow.

Engine

Run our 500+ checks

Full analyzer pipeline — fonts, color, images, transparency, packaging geometry, barcode grading, PDF/X + PDF/A compliance. Separations, TAC, font and image catalogues all shipped in the viewer.

External Import

Bring your own preflight

Already running PitStop, callas pdfToolbox, or Adobe Acrobat Preflight? Submit the PDF plus the XML/JSON report. LintPDF parses the findings and renders them in the viewer with full geometry — no re-checking cost.

Hosted Web Viewer

Every job — engine, external import, or minimal — opens in the same production-grade viewer. Share links are tokenized, branded, and stream from Cloudflare R2 edge caches.

Separations & ink channels

Toggle process (CMYK) and spot channels per page. Isolate single inks, inspect overprint behaviour, verify plate counts.

TAC heatmap + densitometer

Total Area Coverage overlay flags ink-limit violations. Click any pixel to read the densitometer across every separation.

Layers & optional content

PDF optional-content groups render as toggleable layers. Dieline, white ink, and varnish each get their own visibility switch.

File comparison

Diff two revisions side-by-side with SSIM heatmaps. Catch moved elements, color shifts, font substitutions before they ship.

Branded & anonymous share links

Every job mints a tokenized URL with your logo and colors — or strip all branding including PDF metadata with one flag.

Cloudflare R2 edge caching

Page tiles are pre-warmed into Cloudflare R2 on ingest. Reviewers load from the closest edge, no cold-render waits.

Anonymous output for brokers & distributors

Flip a tenant default or pass brand=anonymous per submission to strip every trace of LintPDF and tenant branding from reports, viewers, and share links. PDF metadata is sanitized, the filename becomes preflight-<id>.pdf, and share links freeze that anonymity at mint time — flipping the setting later won't retroactively rebrand already-sent links. Ideal for agencies and brokers who hand reports to end-distributors without exposing their supply chain.

Core Engine

500+ rule-based checks plus a 91-check PDF/X-4 conformance suite (ISO 15930-7) that run on every file. Deterministic, fast, and thorough. Resolution, fonts, colors, transparency, bleeds, barcodes, packaging geometry, artwork comparison, compliance, and more. Included on all plans with no per-check fees.

Font Integrity

Embedding, subsetting, Type 3 detection, encoding mismatches, simulated bold/italic — every font issue that causes RIP failures.

Color Spaces

RGB in CMYK workflows, spot color detection, ICC profile validation, overprint conflicts, and total ink coverage thresholds.

Image Resolution

DPI validation per image, JPEG artifact detection, missing or corrupt streams, alpha transparency in print workflows.

Transparency & Blend Modes

Transparency effects, non-standard blend modes, soft masks, and gradient transparency detection across all pages.

Page Geometry & Bleeds

TrimBox validation, bleed sufficiency, page size matching, content outside trim detection. Every box the printer needs.

PDF/X & PDF/A Compliance

PDF/X-1a, PDF/X-3, PDF/X-4 (ISO 15930) and PDF/A archival conformance. JavaScript, encryption, and prohibited feature detection.

Barcode Grading

ISO 15416/15415 barcode grading for 1D and 2D codes, quiet zone validation, DPI checks, decode verification, and non-compliant color detection.

Overprint & Ink

Overprint settings validation, ink coverage calculations per page, spot color usage tracking, and total area coverage limits.

AI Inspections

Invite-Only Alpha

32 AI-powered inspections across 14 categories. Computer vision, NLP, and machine learning models that catch what deterministic rules cannot. Metered with credits, available on all paid plans.

Barcode Detection

7

AI-powered barcode and QR code analysis beyond ISO grading — type identification, decode verification, placement, and content matching.

  • Barcode Decode — 1 credit
  • QR Validation — 1 credit
  • Barcode Dimensions — 1 credit
  • Pharma Serialization — 1 credit
  • Barcode Content — 1 credit
  • QR Human Readable — 1 credit
  • Barcode+QR Content Match — 1 credit

Content Quality

3

Text-level analysis for spelling, language, and duplicate detection across submitted files.

  • Spell Check — 1 credit
  • Language Detection — 1 credit
  • Duplicate Detection — 1 credit

File Comparison

1

Visual and structural diff between file versions to catch unintended changes.

  • Version Diff — 1 credit

Color Compliance

2

Brand palette enforcement and accessibility contrast validation.

  • Brand Palette Check — 1 credit
  • WCAG Contrast — 1 credit

Trend Analysis

1

Aggregate findings across submissions to identify recurring issues.

  • Submission Quality SPC — 1 credit

Dieline Detection

1

Detect and validate dieline layers in packaging artwork.

  • Dieline by Name — 1 credit

Regulatory Compliance

4

Automated compliance validation for FDA, EU FIR, GHS/CLP, and pharmaceutical labeling requirements.

  • FDA Nutrition Facts — 1 credit
  • EU FIR 1169/2011 — 1 credit
  • GHS CLP 1272/2008 — 1 credit
  • Pharma Font Compliance — 1 credit

Image Analysis

3

Computer vision for image quality assessment and content safety screening.

  • Image Quality — 2 credits
  • NSFW Detection — 2 credits
  • Image Similarity — 2 credits

Document Classification

2

Automatic document type classification and Ruleset suggestion.

  • File Classification — 2 credits
  • Auto Preflight Profile — 2 credits

Logo Verification

1

Compare detected logos against brand reference files for accuracy.

  • Logo Detection — 2 credits

Spatial Analysis

1

Visual analysis of content placement relative to trim, fold, and safety zones.

  • Safe Zone Violations — 2 credits

NLP Interfaces

2

Natural language interfaces for querying and interpreting preflight data.

  • NL Preflight Profile — 2 credits
  • NL Report Interpret — 2 credits

Text Analysis

2

Advanced text content analysis including translation and outline detection.

  • Multi-Language Translation — 2 credits
  • Text as Outlines — 2 credits

Symbol Detection

2

Identify and validate regulatory symbols, recycling marks, and certification logos.

  • Regulatory Symbols — 2 credits
  • Processing Steps Fallback — 2 credits

AI Presets

Pre-configured inspection bundles for common use cases. Select a preset in your submit request or build custom combinations in your Ruleset.

fda-food-label

FDA Food Label

21 CFR 101.9 nutrition panel validation, barcode checks, and content quality for US food packaging.

Est. 8-14 credits per file

eu-food-label

EU Food Label

Regulation 1169/2011 compliance including allergen emphasis, x-height, and nutritional declarations.

Est. 8-14 credits per file

pharma-eu

Pharma EU

EU FMD serialization, Braille placeholder, font compliance, and pharmaceutical barcode validation.

Est. 8-14 credits per file

ghs-chemical

GHS Chemical

CLP 1272/2008 pictogram detection, signal words, H/P statements, and hazard communication compliance.

Est. 8-12 credits per file

packaging-qc

Packaging QC

Barcode grading, dieline detection, safe zone validation, image quality, and content checks for general packaging.

Est. 12-20 credits per file

brand-compliance

Brand Compliance

Logo verification, brand palette enforcement, WCAG contrast, and spell checking for brand consistency.

Est. 8-14 credits per file

full-ai-scan

Full AI Scan

Run all 32 AI inspections across every category. Maximum coverage for comprehensive preflight.

Est. 45-55 credits per file

Text Tier

1 credit · Sub-second latency · Text & structure analysis

Vision Tier

2 credits · 1-5s latency · Vision & ML models